IBM 也推公共 DNS 9.9.9.9

@BXIA 可以的，我这延迟很低

PS C:\WINDOWS\system32> ping 127.0.0.1

正在 Ping 127.0.0.1 具有 32 字节的数据:
来自 127.0.0.1 的回复: 字节=32 时间<1ms TTL=64
来自 127.0.0.1 的回复: 字节=32 时间<1ms TTL=64
来自 127.0.0.1 的回复: 字节=32 时间<1ms TTL=64
来自 127.0.0.1 的回复: 字节=32 时间<1ms TTL=64

新加坡

~$ ping 9.9.9.9 -c 10
PING 9.9.9.9 (9.9.9.9) 56(84) bytes of data.
64 bytes from 9.9.9.9: icmp_seq=1 ttl=50 time=2.54 ms
64 bytes from 9.9.9.9: icmp_seq=2 ttl=50 time=2.63 ms
64 bytes from 9.9.9.9: icmp_seq=3 ttl=50 time=2.43 ms
64 bytes from 9.9.9.9: icmp_seq=4 ttl=50 time=2.46 ms
64 bytes from 9.9.9.9: icmp_seq=5 ttl=50 time=2.44 ms
64 bytes from 9.9.9.9: icmp_seq=6 ttl=50 time=2.48 ms
64 bytes from 9.9.9.9: icmp_seq=7 ttl=50 time=2.44 ms
64 bytes from 9.9.9.9: icmp_seq=8 ttl=50 time=2.40 ms
64 bytes from 9.9.9.9: icmp_seq=9 ttl=50 time=2.42 ms
64 bytes from 9.9.9.9: icmp_seq=10 ttl=50 time=2.40 ms

--- 9.9.9.9 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9015ms
rtt min/avg/max/mdev = 2.402/2.467/2.634/0.092 ms


~$ ping 9.9.9.10 -c 10
PING 9.9.9.10 (9.9.9.10) 56(84) bytes of data.
64 bytes from 9.9.9.10: icmp_seq=1 ttl=50 time=2.23 ms
64 bytes from 9.9.9.10: icmp_seq=2 ttl=50 time=2.18 ms
64 bytes from 9.9.9.10: icmp_seq=3 ttl=50 time=2.10 ms
64 bytes from 9.9.9.10: icmp_seq=4 ttl=50 time=2.13 ms
64 bytes from 9.9.9.10: icmp_seq=5 ttl=50 time=2.20 ms
64 bytes from 9.9.9.10: icmp_seq=6 ttl=50 time=2.13 ms
64 bytes from 9.9.9.10: icmp_seq=7 ttl=50 time=2.17 ms
64 bytes from 9.9.9.10: icmp_seq=8 ttl=50 time=2.08 ms
64 bytes from 9.9.9.10: icmp_seq=9 ttl=50 time=2.18 ms
64 bytes from 9.9.9.10: icmp_seq=10 ttl=50 time=2.15 ms

--- 9.9.9.10 ping statistics ---
10 packets transmitted, 10 received, 0% packet loss, time 9012ms
rtt min/avg/max/mdev = 2.081/2.160/2.236/0.044 ms

➜ ~ ping 9.9.9.9
PING 9.9.9.9 (9.9.9.9): 56 data bytes
64 bytes from 9.9.9.9: icmp_seq=0 ttl=54 time=257.501 ms
64 bytes from 9.9.9.9: icmp_seq=1 ttl=54 time=277.032 ms
64 bytes from 9.9.9.9: icmp_seq=2 ttl=54 time=232.272 ms
64 bytes from 9.9.9.9: icmp_seq=3 ttl=54 time=213.685 ms
^C
--- 9.9.9.9 ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 213.685/245.122/277.032/24.109 ms

➜ ~ ping 9.9.9.10
PING 9.9.9.10 (9.9.9.10): 56 data bytes
64 bytes from 9.9.9.10: icmp_seq=0 ttl=52 time=245.710 ms
64 bytes from 9.9.9.10: icmp_seq=1 ttl=52 time=198.417 ms
64 bytes from 9.9.9.10: icmp_seq=2 ttl=52 time=178.391 ms
64 bytes from 9.9.9.10: icmp_seq=3 ttl=52 time=177.102 ms
64 bytes from 9.9.9.10: icmp_seq=4 ttl=52 time=235.692 ms
^C
--- 9.9.9.10 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 177.102/207.062/245.710/28.663 ms

IBM 推的互联网服务，算了，全是垃圾。

Last login: Fri Nov 17 16:47:19 on ttys003
➜ ~ ping 9.9.9.9
PING 9.9.9.9 (9.9.9.9): 56 data bytes
64 bytes from 9.9.9.9: icmp_seq=0 ttl=50 time=327.342 ms
64 bytes from 9.9.9.9: icmp_seq=1 ttl=50 time=347.923 ms
Request timeout for icmp_seq 2
64 bytes from 9.9.9.9: icmp_seq=3 ttl=50 time=248.081 ms
64 bytes from 9.9.9.9: icmp_seq=4 ttl=50 time=306.733 ms
64 bytes from 9.9.9.9: icmp_seq=5 ttl=50 time=330.761 ms
64 bytes from 9.9.9.9: icmp_seq=6 ttl=50 time=247.672 ms
64 bytes from 9.9.9.9: icmp_seq=7 ttl=50 time=247.926 ms
64 bytes from 9.9.9.9: icmp_seq=8 ttl=50 time=249.439 ms
64 bytes from 9.9.9.9: icmp_seq=9 ttl=50 time=249.715 ms
Request timeout for icmp_seq 10
64 bytes from 9.9.9.9: icmp_seq=11 ttl=50 time=250.040 ms
Request timeout for icmp_seq 12
Request timeout for icmp_seq 13
64 bytes from 9.9.9.9: icmp_seq=14 ttl=50 time=313.979 ms
64 bytes from 9.9.9.9: icmp_seq=15 ttl=50 time=245.275 ms
64 bytes from 9.9.9.9: icmp_seq=16 ttl=50 time=253.463 ms
64 bytes from 9.9.9.9: icmp_seq=17 ttl=50 time=273.494 ms
Request timeout for icmp_seq 18
64 bytes from 9.9.9.9: icmp_seq=19 ttl=50 time=246.300 ms
64 bytes from 9.9.9.9: icmp_seq=20 ttl=50 time=336.858 ms
64 bytes from 9.9.9.9: icmp_seq=21 ttl=50 time=253.505 ms
64 bytes from 9.9.9.9: icmp_seq=22 ttl=50 time=275.436 ms
64 bytes from 9.9.9.9: icmp_seq=23 ttl=50 time=243.658 ms
64 bytes from 9.9.9.9: icmp_seq=24 ttl=50 time=318.290 ms
64 bytes from 9.9.9.9: icmp_seq=25 ttl=50 time=339.844 ms
64 bytes from 9.9.9.9: icmp_seq=26 ttl=50 time=257.309 ms
64 bytes from 9.9.9.9: icmp_seq=27 ttl=50 time=279.605 ms
64 bytes from 9.9.9.9: icmp_seq=28 ttl=50 time=244.957 ms
Request timeout for icmp_seq 29
Request timeout for icmp_seq 30
Request timeout for icmp_seq 31
64 bytes from 9.9.9.9: icmp_seq=32 ttl=50 time=280.713 ms
64 bytes from 9.9.9.9: icmp_seq=33 ttl=50 time=304.152 ms
64 bytes from 9.9.9.9: icmp_seq=34 ttl=50 time=324.500 ms
64 bytes from 9.9.9.9: icmp_seq=35 ttl=50 time=243.701 ms
64 bytes from 9.9.9.9: icmp_seq=36 ttl=50 time=243.540 ms
64 bytes from 9.9.9.9: icmp_seq=37 ttl=50 time=242.556 ms
64 bytes from 9.9.9.9: icmp_seq=38 ttl=50 time=242.814 ms
64 bytes from 9.9.9.9: icmp_seq=39 ttl=50 time=324.518 ms
Request timeout for icmp_seq 40
^C
--- 9.9.9.9 ping statistics ---
42 packets transmitted, 32 packets received, 23.8% packet loss
round-trip min/avg/max/stddev = 242.556/277.941/347.923/36.288 ms
➜ ~

0.0.0.0 这个 IP 多少钱？

然而这个 DNS 对国内来说没什么卵用，防不了污染、CDN 也不友好

6 翻了

伦敦的？我说这么慢

PING 9.9.9.9 (9.9.9.9) 56(84) bytes of data.
64 bytes from 9.9.9.9: icmp_seq=1 ttl=59 time=22.9 ms
64 bytes from 9.9.9.9: icmp_seq=2 ttl=59 time=36.1 ms
64 bytes from 9.9.9.9: icmp_seq=3 ttl=59 time=27.1 ms
64 bytes from 9.9.9.9: icmp_seq=4 ttl=59 time=9.86 ms
64 bytes from 9.9.9.9: icmp_seq=5 ttl=59 time=25.7 ms
^C
--- 9.9.9.9 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4250ms
rtt min/avg/max/mdev = 9.863/24.369/36.116/8.484 ms

————————————

上海阿里云实测

@ponyxx
PING 9.9.9.9 (9.9.9.9) 56(84) bytes of data.
64 bytes from 9.9.9.9: icmp_seq=1 ttl=59 time=22.9 ms
64 bytes from 9.9.9.9: icmp_seq=2 ttl=59 time=36.1 ms
64 bytes from 9.9.9.9: icmp_seq=3 ttl=59 time=27.1 ms
64 bytes from 9.9.9.9: icmp_seq=4 ttl=59 time=9.86 ms
64 bytes from 9.9.9.9: icmp_seq=5 ttl=59 time=25.7 ms
^C
--- 9.9.9.9 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4250ms
rtt min/avg/max/mdev = 9.863/24.369/36.116/8.484 ms

————————————

上海阿里云实测

——————————————
抱歉，发错了，上边这是美国 cn2 实测，以下才是上海阿里云实测

https://i.loli.net/2018/01/19/5a620ce7c82aa.png

坡县 aws
ping 9.9.9.9 -c 5
PING 9.9.9.9 (9.9.9.9) 56(84) bytes of data.
64 bytes from 9.9.9.9: icmp_seq=1 ttl=50 time=2.02 ms
64 bytes from 9.9.9.9: icmp_seq=2 ttl=50 time=1.97 ms
64 bytes from 9.9.9.9: icmp_seq=3 ttl=50 time=1.91 ms
64 bytes from 9.9.9.9: icmp_seq=4 ttl=50 time=1.95 ms
64 bytes from 9.9.9.9: icmp_seq=5 ttl=50 time=1.97 ms

--- 9.9.9.9 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4004ms
rtt min/avg/max/mdev = 1.911/1.968/2.026/0.054 ms